The 43-year-old Mosley (48-9-1, 40 KOs) floored Mayorga with a body shot at 2:59 of the sixth round after largely controlling an uneventful bout at the historic Forum.

The 41-year-old Mayorga (31-9-1) was in unimpressive shape and did little to threaten Mosley, the former three-division champion who had won just one of his previous six fights.

Nearly seven years ago, Mosley stopped Mayorga with one second left in the 12th round of their first meeting.

Mosley hadn’t fought since November 2013. He promoted the pay-per-view bout himself, but curiously scheduled it on the same night as Leo Santa Cruz’s thrilling featherweight victory over Abner Mares just 10 miles away at Staples Center.

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